diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 26ecd31..c73e032 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10"]
+        python-version: ["3.8", "3.9", "3.10"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/demo.py b/demo.py
index 6a16b35..eda0801 100644
--- a/demo.py
+++ b/demo.py
@@ -1,7 +1,9 @@
-def my_function():
+"""Demo module for hello function."""
 
-    a = 5
-    return a 
 
+def hello():
+    """Return a demo greeting message."""
+    return "hello dosto"
 
-my_function()
+
+hello()
diff --git a/testing.py b/testing.py
index 44de8b7..f124c17 100644
--- a/testing.py
+++ b/testing.py
@@ -2,6 +2,7 @@
 This module contains a simple hello function.
 """
 
+
 def hello():
     """
     This function returns a greeting message.